61783073 has 4 divisors (see below), whose sum is σ = 67399728. Its totient is φ = 56166420.

The previous prime is 61783069. The next prime is 61783097. The reversal of 61783073 is 37038716.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61783073 - 2² = 61783069 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61783063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2808311 + ... + 2808332.

It is an arithmetic number, because the mean of its divisors is an integer number (16849932).

Almost surely, 2^61783073 is an apocalyptic number.

It is an amenable number.

61783073 is a deficient number, since it is larger than the sum of its proper divisors (5616655).

61783073 is a wasteful number, since it uses less digits than its factorization.

61783073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5616654.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 61783073 is about 7860.2209256483. The cubic root of 61783073 is about 395.3270228840.

The spelling of 61783073 in words is "sixty-one million, seven hundred eighty-three thousand, seventy-three".